#include<iostream>
#include<pthread.h>

class Mutex
{
public:
    Mutex(pthread_mutex_t *mpt):pmtx_(mpt)
    {}
    void lock()
    {
        //std::cout<<"加锁!"<<std::endl;
        pthread_mutex_lock(pmtx_);
    }
    void unlock()
    {
        //std::cout<<"解锁"<<std::endl;
        pthread_mutex_unlock(pmtx_);
    }
    ~Mutex()
    {}

private:
    pthread_mutex_t *pmtx_;
};

//RAII风格加锁方式
class lockGuard
{
public:
    lockGuard(pthread_mutex_t *mtx):mtx_(mtx)
    {
        mtx_.lock();
    }
    ~lockGuard()
    {
        mtx_.unlock();
    }
private:
    Mutex mtx_;
};